Oxygen

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Across
  1. 3. Gas responsible for cellular respiration
  2. 4. An instrument used to measure blood oxygen levels 2 words
  3. 7. Tiny air sacs in the lungs where gas exchange occurs
  4. 8. The medical term for bluish discoloration of the skin due to lack of oxygen
  5. 9. A respiratory infection
Down
  1. 1. The medical term for the sound produced when air flows through narrowed airways
  2. 2. Low levels of oxygen in the blood
  3. 5. Chronic lung disease with retained CO2
  4. 6. The medical term for difficulty breathing
  5. 7. Medical diagnosis characterized by inflammation